Chinese Optics Letters, 2017, 15 (12): 123101, Published Online: Jul. 18, 2018
Fabrication of multi-wavelength visible and infrared filter for solar atmosphere tomographic imaging Download: 937次
Abstract
To simultaneously obtain high-resolution multi-wavelength (from visible to near infrared) tomographic images of the solar atmosphere, a high-performance multi-wavelength optical filter has to be used in solar imaging telescopes. In this Letter, the fabrication of the multi-wavelength filter for solar tomographic imaging is described in detail. For this filter, Ta 2 O 5 and SiO 2 are used as high- and low-index materials, respectively, and the multilayer structure is optimized by commercial Optilayer software at a 7.5° angle of incidence. Experimentally, this multi-wavelength optical filter is prepared by a plasma ion-assisted deposition technique with optimized deposition parameters. High transmittance at 393.3, 396.8, 430.5, 525, 532.4, 656.8, 705.8, 854.2, 1083, and 1565.3 nm, as well as high reflectance at 500 and 589 nm are achieved. Excellent environmental durability, demonstrated via temperature and humidity tests, is also established.
Mingdong Kong, Chun Guo, Bincheng Li, Wenyan He, Ming Wei. Fabrication of multi-wavelength visible and infrared filter for solar atmosphere tomographic imaging[J]. Chinese Optics Letters, 2017, 15(12): 123101.